/*
 * Copyright 2011-2021 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.lettuce.core.event;

import reactor.core.publisher.Flux;

/**
 * Interface for an EventBus. Events can be published over the bus that are delivered to the subscribers.
 *
 * @author Mark Paluch
 * @since 3.4
 */
public interface EventBus {

    /**
     * Subscribe to the event bus and {@link Event}s. The {@link Flux} drops events on backpressure to avoid contention.
     *
     * @return the observable to obtain events.
     */
    Flux<Event> get();

    /**
     * Publish a {@link Event} to the bus.
     *
     * @param event the event to publish
     */
    void publish(Event event);

}
